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Articles on Earth's mantle

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Kimberlite volcanic rock with mantle crystals (green olivine and purple and orange garnet) and fragments of country rock (light grey).

We used to think diamonds were everywhere. New research suggests they’ve always been rare

Diamonds form alongside a distinct purple companion. We studied it to reach a conclusion about how rare they might actually be.
Earth’s interior 80 million years ago with hot structures in yellow to red (darker is shallower) and cold structures in blue (darker is deeper). Ömer Bodur/Nature

Volcanoes, diamonds, and blobs: a billion-year history of Earth’s interior shows it’s more mobile than we thought

Ancient blobs deep inside the Earth gather together and break apart like continents, according to new research.
Earth crust cutaway. Jeremy Kemp

Meet the earthquakes that happen 600km underground

A little more than 90 years ago, British geologist Herbert Hall Turner noticed some earthquake data that suggested a surprising explanation. The only way to explain it was if the quake had occurred hundreds…

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